错误:Internal error: (java.lang.IllegalAccessError) class com.intellij.util.io.FileChannelUtil (in unn_error:internal error: (java.lang.illegalaccesserro

java项目从8转到17后运行项目出现报错，连运行过程都没有，直接报错

错误:Internal error: (java.lang.IllegalAccessError) class com.intellij.util.io.FileChannelUtil (in unnamed module @0x60611244) cannot access class sun.nio.ch.FileChannelImpl (in module java.base) because module java.base does not export sun.nio.ch to unnamed module @0x60611244
java.lang.IllegalAccessError: class com.intellij.util.io.FileChannelUtil (in unnamed module @0x60611244) cannot access class sun.nio.ch.FileChannelImpl (in module java.base) because module java.base does not export sun.nio.ch to unnamed module @0x60611244
	at com.intellij.util.io.FileChannelUtil.setupUnInterruptibleHandle(FileChannelUtil.java:26)
	at com.intellij.util.io.FileChannelUtil.<clinit>(FileChannelUtil.java:18)
	at com.intellij.util.io.ReadWriteDirectBufferWrapper$FileContext$1.execute(ReadWriteDirectBufferWrapper.java:50)
	at com.intellij.util.io.ReadWriteDirectBufferWrapper$FileContext$1.execute(ReadWriteDirectBufferWrapper.java:42)
	at com.intellij.openapi.util.io.FileUtilRt.doIOOperation(FileUtilRt.java:945)
	at com.intellij.util.io.ReadWriteDirectBufferWrapper$FileContext.<init>(ReadWriteDirectBufferWrapper.java:42)
	at com.intellij.util.io.ReadWriteDirectBufferWrapper.create(ReadWriteDirectBufferWrapper.java:27)
	at com.intellij.util.io.DirectBufferWrapper.getBuffer(DirectBufferWrapper.java:24)
	at com.intellij.util.io.ReadWriteDirectBufferWrapper.getBuffer(ReadWriteDirectBufferWrapper.java:16)
	at com.intellij.util.io.PagedFileStorage$StorageLock.createValue(PagedFileStorage.java:631)
	at com.intellij.util.io.PagedFileStorage$StorageLock.get(PagedFileStorage.java:558)
	at com.intellij.util.io.PagedFileStorage$StorageLock.access$500(PagedFileStorage.java:466)
	at com.intellij.util.io.PagedFileStorage.getBufferWrapper(PagedFileStorage.java:407)
	at com.intellij.util.io.PagedFileStorage.getReadOnlyBuffer(PagedFileStorage.java:375)
	at com.intellij.util.io.PagedFileStorage.getInt(PagedFileStorage.java:155)
	at com.intellij.util.io.ResizeableMappedFile.getInt(ResizeableMappedFile.java:217)
	at com.intellij.util.io.PersistentEnumeratorBase.<init>(PersistentEnumeratorBase.java:212)
	at com.intellij.util.io.PersistentBTreeEnumerator.<init>(PersistentBTreeEnumerator.java:73)
	at com.intellij.util.io.PersistentEnumeratorDelegate.<init>(PersistentEnumeratorDelegate.java:47)
	at com.intellij.util.io.PersistentHashMap.<init>(PersistentHashMap.java:149)
	at com.intellij.util.io.PersistentHashMap.<init>(PersistentHashMap.java:138)
	at com.intellij.util.io.PersistentHashMap.<init>(PersistentHashMap.java:129)
	at com.intellij.util.io.PersistentHashMap.<init>(PersistentHashMap.java:121)
	at com.intellij.util.io.PersistentHashMap.<init>(PersistentHashMap.java:114)
	at org.jetbrains.jps.incremental.storage.AbstractStateStorage.createMap(AbstractStateStorage.java:124)
	at org.jetbrains.jps.incremental.storage.AbstractStateStorage.<init>(AbstractStateStorage.java:27)
	at org.jetbrains.jps.incremental.storage.FileTimestampStorage.<init>(FileTimestampStorage.java:27)
	at org.jetbrains.jps.incremental.storage.ProjectStamps.<init>(ProjectStamps.java:39)
	at org.jetbrains.jps.incremental.storage.ProjectTimestamps.<init>(ProjectTimestamps.java:19)
	at org.jetbrains.jps.cmdline.BuildRunner.load(BuildRunner.java:92)
	at org.jetbrains.jps.cmdline.BuildSession.runBuild(BuildSession.java:274)
	at org.jetbrains.jps.cmdline.BuildSession.run(BuildSession.java:130)
	at org.jetbrains.jps.cmdline.BuildMain$MyMessageHandler.lambda$channelRead0$0(BuildMain.java:232)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
	at java.base/java.lang.Thread.run(Thread.java:833)

发现是ideal的版本问题，ideal2019不支持jdk17，所以卸载ideal安装新版本

灵感：【Bug记录】Internal error: (java.lang.IllegalAccessError) class com.intellij.util.io.FileChannelUtil_idea2019支持jdk17吗_力巴尔的博客-CSDN博客

卸载教程：idea卸载与重装_idea卸载干净并重新安装_Jennifer33K的博客-CSDN博客

安装教程：IDEA安装教程（傻瓜式安装）_AiLi0617的博客-CSDN博客